JP2013524919A5 - - Google Patents

Claims (14)

A respiratory motion detection device for detecting a respiratory motion of a person,
An illuminator that illuminates a person using at least one of a sinusoidal illumination pattern and a sawtooth illumination pattern ;
A detector that detects the illumination pattern on the person over time;
A respiratory motion signal determination unit that determines a temporal respiratory motion signal indicating a human respiratory motion from the detected illumination pattern;   The respiratory motion detection according to claim 1, wherein the illuminator shines light on a person in an illumination direction, and the detector detects the illumination pattern on the person in the detection direction, and the illumination direction and the detection direction are different. apparatus. The illuminator and the detector are:
The illuminator illuminates the human surface with an illumination pattern under an illumination angle defined as an angle between the illumination direction and an axis perpendicular to the illuminated human surface;
Enabling the detector to detect an illumination pattern of a human surface under a detection angle defined as an angle between the detection direction and an axis that is perpendicular to the illuminated human surface; The respiratory motion detection device according to claim 2.   The detector detects several images of the illumination pattern at different times, and the respiratory motion signal determination unit relies on the sum of the absolute differences of the image values of corresponding positions in temporally consecutive images. The respiratory motion detection device according to claim 1, wherein the temporal respiratory motion signal is determined.   The respiratory motion detection device according to claim 1, further comprising a respiratory feature determination unit that determines a respiratory feature of the person from the determined temporal respiratory motion signal.   6. The respiratory motion detection device according to claim 5, wherein the respiratory feature determination unit determines an inspiratory / expiratory transition and an expiratory / inspiratory transition depending on a time when the respiratory motion signal is minimal.   6. The respiratory motion detection device according to claim 5, wherein the respiratory feature determination unit determines an inspiration / expiration transition depending on a high frequency minimum and an expiration / inspiration transition depending on a low frequency minimum. The respiratory feature determination unit comprises:
Apply a low pass filter to the respiratory motion signal so that the high frequency minima are removed,
Determining the minimum of the respiratory motion signal applied to the low-pass filter;
The respiratory motion detection device according to claim 7, wherein the expiration / inspiration transition is determined from the determined local minimum. The respiratory feature determination unit comprises:
Calculating the standard deviation of the streaming of the respiratory motion signal;
Determine the maximum of the calculated standard deviation of the streaming,
Determining a peak position of a peak of the calculated streaming standard deviation having an amplitude greater than a predetermined threshold;
A peak position closest to the position of each local maximum between the determined peak positions is determined for each local maximum of the local maximum;
The respiratory motion detection device according to claim 7, wherein the inspiration / expiration transition is determined from the determined peak position.   The respiratory feature determination unit further weights the calculated streaming standard deviation before determining the position of the peak, and the corresponding respiratory motion signal value is located at a minimum or valley of the respiratory motion signal; , The weighting for the calculated streaming standard deviation value is greater, and if the corresponding respiratory motion signal value is not located in the minimum or valley of the respiratory motion signal, the weighting for the calculated streaming standard deviation value is The respiratory motion detection device according to claim 9, which is smaller.   The respiratory motion detection device according to claim 1, wherein the illuminator illuminates a person with a spatially high-frequency illumination pattern. The respiratory motion detection device detects the respiratory motion of several people,
The illuminator illuminates several people with the illumination pattern,
The respiratory motion signal determination unit assigns different areas of the detected illumination pattern to several persons, and determines the respiratory movement of one of several persons from the area of the detected illumination pattern assigned to each person;
The respiratory motion detection device according to claim 1. A respiratory motion detection method for detecting a respiratory motion of a person,
Illuminate people with lighting patterns,
Detecting a lighting pattern on a person over time,
Determining a respiratory motion signal indicative of a human respiratory motion from the detected illumination pattern. A respiratory motion detection computer program for detecting the respiratory movement of a person, when executed on a computer for controlling the respiratory motion detection apparatus according to claim 1, wherein the respiratory motion detection apparatus according to claim 1, wherein claim 13 The said respiratory motion detection computer program which has a program code means to perform the step of the respiratory motion detection method of description.